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Publication numberUS5886298 A
Publication typeGrant
Application numberUS 08/707,883
Publication dateMar 23, 1999
Filing dateSep 9, 1996
Priority dateSep 9, 1996
Fee statusLapsed
Also published asUS6025557
Publication number08707883, 707883, US 5886298 A, US 5886298A, US-A-5886298, US5886298 A, US5886298A
InventorsBassel Hage Daoud
Original AssigneeLucent Technologies Inc.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Apparatus for mounting cables
US 5886298 A
Abstract
Disclosed is apparatus for mounting a cable within an electronics enclosure, such as a network interface unit, which includes a splice chamber. A recessed portion is formed in one surface of the chamber, and a tie bar is formed across the recessed portion to provide a gap. A tie wrap is threaded through the gap and tightened around the cable to secure it to the surface. A grommet can also be mounted at the opening to the chamber. The grommet is made of a compliant material which has a series of perforations defining a plurality of non-concentric circles, and a series of perforations defining radial lines. A number of circles can be removed approximating the diameter of the cable, and segments formed by the radial lines can be used as flaps to prevent dust or other undesirable material from entering the chamber.
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Claims(9)
The invention claimed is:
1. Apparatus for mounting a cable within an electronics enclosure comprising:
a splice chamber having a bottom surface and an opening for receiving the cable;
a recessed portion formed in the bottom surface in close proximity to the opening; and
a tie bar formed across the recessed portion to form a gap therebetween, the gap being sufficient for insertion of a tie wrap or hose clamp which is capable of securing the cable to the surface.
2. Apparatus according to claim 1 wherein the tie bar is formed integrally with the surface.
3. Apparatus according to claim 1 wherein the tie bar includes a series of projections which are capable of gripping the cable.
4. Apparatus according to claim 1 wherein the recessed portion includes an arcuate surface.
5. Apparatus according to claim 1 wherein the enclosure is utilized to enclose a network interface unit for connecting customer equipment and a telecommunications network.
6. Apparatus according to claim 1 further comprising a grommet mounted in the opening, said grommet comprising a compliant material including a series of perforations defining non-concentric circles of increasing diameter in the material.
7. Apparatus according to claim 6 wherein the perforations also include radial lines defining segments which, upon removal of at least one of said circles, form flaps in the material adjacent an aperture formed by the removal.
8. Apparatus according to claim 6 further comprising a frame for holding the compliant material, said frame including a slot for sliding the grommet on a flange formed at the opening.
9. Apparatus according to claim 1 wherein the recessed portions and the bar are formed in the surface wherein the surface is a bottom surface of the splice chamber.
Description
FIELD OF THE INVENTION

This invention relate to telecommunications apparatus.

BACKGROUND OF THE INVENTION

Network interface units constitute the demarcation between the customer's equipment and a telecommunications network. In buildings including multiple subscribers, the interface unit is typically mounted in a basement and includes an array of customer bridges, each bridge being coupled to an individual subscriber's line. The bridges are coupled to the network through an RJ11 jack and plug so that the customer can plug a working phone into the jack to determine if any problem lies in the customer or network side of the telecommunications system. Network interface units also typically include a building entrance protector portion which comprises a cable splice chamber and a protector field for providing surge protection for each customer. (For an example of a network interface unit, see U.S. Pat. No. 5,363,440 issued to Daoud).

In the splice chamber, it is usually desirable to provide strain relief for the incoming cable to prevent damage thereto. Standard brackets for holding the cable are effective, but expensive. It is also desirable to provide a grommet at the entry point of the cable in order to prevent the entry of pests or dust into the unit and prevent fire from escaping the splice chamber. A typical grommet comprises a compliant material with a series of perforations in the shape of concentric circles which can be cut out to define an opening according to the size of the cable. (See, U.S. Pat. No. 4,704,499 issued to Faust, and U.S. Pat. No. 4,988,834 issued to Birch.)

SUMMARY OF THE INVENTION

The invention is an apparatus for mounting a cable within an electronic enclosure having a splice chamber. The chamber includes a surface and an opening for receiving the cable. A recessed portion is formed in the surface in close proximity to the opening. A tie bar is formed across the recessed portion to form a gap therebetween, the gap being sufficient for insertion of a tie wrap or hose clamp which is capable of securing the cable. The opening may be covered by a grommet made of a compliant material with perforations defining non-concentric circles of increasing diameter in the material. The perforations also include a series of radial lines defining segments which, upon removal of at least one of said circles, form flaps in the material adjacent an aperture formed by the removal.

BRIEF DESCRIPTION OF THE FIGURES

These and other features of the invention are delineated in detail in the description to follow. In the drawing:

FIG. 1 is a perspective view of a portion of a network interface unit in accordance with an embodiment of the invention;

FIG. 2 is a cross sectional view taken along line 2--2 of FIG. 1;

FIG. 3 is a frontal view of a grommet which may be included in the network interface unit of FIG. 1.

It will be appreciated that, for purposes of illustration, these figures are not necessarily drawn to scale.

DETAILED DESCRIPTION

Referring now to the drawings, in which like reference numerals identify similar or identical elements, FIG. 1 illustrates a portion of a network interface unit, 10, which embodies the present invention. Specifically, FIG. 1 shows the bottom layer of a two-layer design, where the bottom layer includes a splice chamber, 11, a plug-in socket field, 12, for mounting protectors, e.g., 13, and a cross-connect field, 14. The array of protectors are electrically coupled to a bundle of wires, 15, which terminate in a splice connector, 16. The splice chamber, 11, includes at least one, and preferably two, ports, 17 and 18, for permitting ingress and egress of the telecommunications cable (not shown). (For more details of a network interface unit, see U.S. Pat. No. 5,363,440, cited above, and incorporated by reference herein.)

The splice chamber, 11, is defined by two side walls, 19 and 20, and a bottom surface, 21. Adjacent to each port, e.g., 17, is a recessed portion including an arcuate surface, 22, which is formed in the bottom surface, 21. Shaped across the recessed portion is a tie bar, 23, which forms a gap, G, with the arcuate surface, 22. The gap, G, is sufficient to allow a tie wrap, 25, to be threaded therethrough, i.e., a dimension typically in the range 12 mm to 58 mm. The tie bar, 23, and recessed portion are preferably formed integrally with the bottom surface, 21. The tie bar, 23, preferably includes a series of sharp projections, 24, which provide a gripping surface for the cable.

Thus, a cable entering or exiting the ports, 17 or 18, can be secured to the bottom surface, 21, by wrapping the tie wrap, 25, around the cable and tightening according to the diameter of the cable. The combination tie wrap and tie bar, 23, thus provides strain relief for the cable at minimal expense.

In accordance with a further feature of the invention, grommets, e.g., 30, are provided at the ports, e.g., 18. (In FIG. 1, only a single grommet is shown for purposes of illustration, but it will be realized that an identical grommet would be provided at port 17.) Reference is also made to FIG. 3 which illustrates the face of the grommet, 30, opposite to that shown in FIG. 1. The grommet includes a frame, 31, typically made of plastic, which supports a compliant material, 32, typically made of polyvinyl chloride. The frame, 31, and the compliant material, 32, are preferably the same material. However, the frame, 31, is made stiffer due to the material thickness and the confirguration of the struts, 50. The frame, 31, and compliant material, 32, are separated by a slot, 33. The grommets may be inserted by sliding the slot over a flange (see, e.g., 53, at port 17) at the entrance to the ports.

As best seen in FIG. 3, most of the compliant material, 32, includes a series of perforations in the shape of non-concentric circles, 34-39, having increasing diameters and a common portion near the bottom of the compliant material, 32. In a typical example, the smallest circle, 34, would have a diameter of 2.54 cm (1 inch) and each succeeding circle would have a diameter which increases by 0.64 cm (0.25 inches). Further perforations are provided in the form of radial lines, in this example, four such lines designated 40-43, which pass through the center of the smallest circle, 34, and extend essentially the full distance occupied by the circles, 34-39. Since four lines are provided in this example, it is convenient to have the lines at 45 degree angles to the adjacent lines. It will be appreciated that the angles and the number of lines can be varied, but preferably there should be at least two radial lines. The radial lines, 40-43, divide the circles into segments, e.g., 44 and 45.

When it is desired to introduce or exit a cable from the splice chamber, 11, the appropriate circular perforations can be cut to remove a number of circles defined thereby depending upon the diameter of the cable. For example, if the cable has a diameter greater than 3.2 cm (1.25 inches), but less than 3.8 cm (1.50 inches), the circles defined by perforations 34 and 35 will be removed to provide the appropriate sized hole. The portion of the radial lines, 40-43, between perforations 35 and 36 are then cut so that the segments, e.g., 44 and 45, defined by the radial lines can now act as flaps to plug the space which would have been present between the cable and the perforation 36. Thus, the presence of radial lines, 40-43, ensures an effective barrier against dust entering the splice chamber regardless of the size of the cable.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4403106 *Sep 21, 1981Sep 6, 1983Northern Telecom LimitedTerminal enclosure for cable stubs, with variable entry positions
US4704499 *Jun 18, 1986Nov 3, 1987American Telephone And Telegraph Company At&T Bell LaboratoriesLocking mechanism for aerial cable closure and terminals
US4950184 *Oct 13, 1989Aug 21, 1990Panduit Corp.Wall plate assembly
US4988834 *Aug 28, 1989Jan 29, 1991At&T Bell LaboratoriesCable sealing system
US5276279 *Feb 3, 1992Jan 4, 1994The Whitaker CorporationCommunication outlet
US5363440 *Mar 31, 1993Nov 8, 1994At&T Bell LaboratoriesMultilayered type network interface unit
US5510574 *Jan 6, 1994Apr 23, 1996Hsing Chau Industrial Co., Ltd.Electric shielding metal shell for a receptacle in a computer network system
CA1254295A1 *Jun 24, 1985May 16, 1989Thomas E. LewisEccentric knockout structure for molded box
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6031182 *Mar 16, 1998Feb 29, 2000Lucent Technologies Inc.Concentric strain relief mechanism for variable diameter cables
US6080933 *Oct 2, 1998Jun 27, 2000Arlington Industries, Inc.Snap in cable connector
US6211465 *Oct 14, 1999Apr 3, 2001Sofanou S.A.Sealed connecting box for fitting a tube to an aperture of a wall
US7175217Feb 3, 2006Feb 13, 2007Toyota Technical Center Usa, Inc.Vehicle power outlet bezel assembly
DE102005018812A1 *Apr 22, 2005Sep 21, 2006Siemens AgHousing wall of installation device e.g. installation distributor has perforation along lead through edge whereby perforation opening completely penetrates housing wall
Classifications
U.S. Classification174/652, 439/471
International ClassificationH01R13/72, H04Q1/02
Cooperative ClassificationH04Q1/028, H04Q1/06, H01R13/72
European ClassificationH01R13/72, H04Q1/02N
Legal Events
DateCodeEventDescription
May 10, 2011FPExpired due to failure to pay maintenance fee
Effective date: 20110323
May 4, 2011ASAssignment
Effective date: 20110114
Free format text: SECURITY AGREEMENT;ASSIGNORS:ALLEN TELECOM LLC, A DELAWARE LLC;ANDREW LLC, A DELAWARE LLC;COMMSCOPE, INC OF NORTH CAROLINA, A NORTH CAROLINA CORPORATION;REEL/FRAME:026272/0543
Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, NE
May 3, 2011ASAssignment
Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, NE
Free format text: SECURITY AGREEMENT;ASSIGNORS:ALLEN TELECOM LLC, A DELAWARE LLC;ANDREW LLC, A DELAWARE LLC;COMMSCOPE, INC. OF NORTH CAROLINA, A NORTH CAROLINA CORPORATION;REEL/FRAME:026276/0363
Effective date: 20110114
Mar 23, 2011LAPSLapse for failure to pay maintenance fees
Feb 3, 2011ASAssignment
Effective date: 20110114
Owner name: ALLEN TELECOM LLC, NORTH CAROLINA
Owner name: COMMSCOPE, INC. OF NORTH CAROLINA, NORTH CAROLINA
Free format text: PATENT RELEASE;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:026039/0005
Owner name: ANDREW LLC (F/K/A ANDREW CORPORATION), NORTH CAROL
Oct 25, 2010REMIMaintenance fee reminder mailed
Jan 9, 2008ASAssignment
Owner name: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT, CA
Free format text: SECURITY AGREEMENT;ASSIGNORS:COMMSCOPE, INC. OF NORTH CAROLINA;ALLEN TELECOM, LLC;ANDREW CORPORATION;REEL/FRAME:020362/0241
Effective date: 20071227
Owner name: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT,CAL
Free format text: SECURITY AGREEMENT;ASSIGNORS:COMMSCOPE, INC. OF NORTH CAROLINA;ALLEN TELECOM, LLC;ANDREW CORPORATION;REEL/FRAME:20362/241
Oct 21, 2007ASAssignment
Owner name: COMMSCOPE, INC. OF NORTH CAROLINA, NORTH CAROLINA
Free format text: MERGER;ASSIGNOR:COMMSCOPE SOLUTIONS PROPERTIES, LLC;REEL/FRAME:019991/0643
Effective date: 20061220
Owner name: COMMSCOPE, INC. OF NORTH CAROLINA,NORTH CAROLINA
Oct 18, 2007ASAssignment
Owner name: COMMSCOPE SOLUTIONS PROPERTIES, LLC, NEVADA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AVAYA TECHNOLOGY CORPORATION;REEL/FRAME:019974/0921
Effective date: 20040129
Sep 27, 2007ASAssignment
Owner name: AVAYA TECHNOLOGY CORPORATION, NEW JERSEY
Free format text: RELEASE BY SECURED PARTY;ASSIGNOR:THE BANK OF NEW YORK;REEL/FRAME:019881/0532
Effective date: 20040101
Sep 1, 2006FPAYFee payment
Year of fee payment: 8
Aug 29, 2002FPAYFee payment
Year of fee payment: 4
Mar 26, 2002ASAssignment
Owner name: AVAYA TECHNOLOGY CORP., NEW JERSEY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LUCENT TECHNOLOGIES INC.;REEL/FRAME:012691/0572
Effective date: 20000929
Owner name: AVAYA TECHNOLOGY CORP. 211 MOUNT AIRY ROAD BASKING
Owner name: AVAYA TECHNOLOGY CORP. 211 MOUNT AIRY ROADBASKING
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LUCENT TECHNOLOGIES INC. /AR;REEL/FRAME:012691/0572
Sep 9, 1996ASAssignment
Owner name: LUCENT TECHNOLOGIES INC., NEW JERSEY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DAOUD, BASSEL HAGE;REEL/FRAME:008151/0204
Effective date: 19960904